Lapathifolium:  Answers to key questions in Budd's Flora and Flora of Alberta leading to this species.  
            This is a variable species.  The pubescence on the leaves can vary from plant to plant, and can disappear as the plant matures.  This specimen is pubescent only on the bottom of the lower leaves.

	plants annual; NOT perennial with extensively creeping rootstocks (BF,FOA)
	plants NOT twining (BF,FOA)
	stem often branched (FOA,BF)
	ocreae not ciliate (BF)
	ocreae entire or merely lacerate or with a fringe of minute bristles; ocreae NOT fringed with coarse bristles (FOA)
	ocreae rarely deeply lacerate (FOA)
	leaves all similar; NOT with long-stalked basal leaves and smaller, stalkless stem leaves (BF)
	leaves chiefly cauline; NOT chiefly basal (FOA)
	leaves NOT jointed at base (FOA)
	leaves large (BF)
	leaves linear, lanceolate, or oblong, cuneate at base; NOT broad, NOT sagittate, NOT hastate, NOT cordate (BF,FOA)
	leaves glabrous below; NOT sparing pubescent (BF)
	leaves white pubescent, glabrous or glandular below (FOA)
	stem commonly with several spike-like racemes (FOA)
	flowers in dense terminal (or axillary) spikes or racemes; flowers NOT solitary, flowers NOT in small axillary clusters; flowers NOT with foliaceous bracts (FOA,BF)
	peduncles and often perianth bearing yellow subsessile glands (BF)
	spikes arching or nodding, slender; spikes NOT erect and NOT thick (FOA)
	flowers pink to whitish; NOT greenish (FOA)
	perianth NOT covered with brownish glands (BF)
	achene 1.5 to 2.0 mm wide; NOT 2.0 to 3.0 mm wide (BF)
	achenes about 2 mm long; NOT 3 mm long (FOA)